Investigators said Muni Savyon, 54, shot and killed his 9-year-old son, Joshua, during a supervised visit at the Manchester YWCA. He then killed himself. A counselor in the room escaped without injury.

According to the New Hampshire Attorney General's Office, the YWCA has a metal detecting wand but it was not used Sunday.

YWCA president Monica Krinsky said someone determined to carry out violence would do so regardless of security measures.

"I’d like to see 15 layers of security and safety but people who are going to commit an act of violence who are committed to committing a homicide -- they’re going to do it," Krinsky said.

She said she can’t explain why her staffers did not use the metal detector to search Savyon.

"At some point we have to shift this off, ‘did we wand this person.’ To, ‘this man came in here and killed his son,’ We were doing what we could do to have him visit with his child in a safe, supportive environment and he made that decision," Krinsky said.

Court records show Savyon was accused of making threats about his son in the past. On March 29, 2012, Savyon met his son's mother in Nashua for a doctor's visit for the boy. The boy's mother told officials said that Savyon was upset about custody arrangements, telling her he bought and gun and that, "It's going to be either you or Josh and I."

"He's made threats in the past to harm himself, his son and his son's mother, and unfortunately, he carried through with that," said Assistant Attorney General Jeffery Strelzin.

Savyon was charged with domestic-violence-related criminal threatening as a result of that incident. The complaint was placed on file without a finding in July 2012.

The day after the confrontation at the doctor's appointment, according to court records, the child's mother filed for a restraining order, saying Savyon told her he had "snapped."

"I am afraid for the safety of me and my son," she wrote in the application.

That petition was granted in May 2012, and in the final order, a judge ruled that Savyon was not to possess any firearms and "shall complete anger management evaluation in an attempt to assess dangerousness."

Autopsies on Savyon and Joshua are scheduled for Monday. The Attorney General's Office said the investigation is continuing.

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